The M.I.T. General Circulation Model (MITgcm) Release 1 contains code for
simulating a wide variety of ocean and atmosphere problems. The model is
compatible with platforms ranging from desktop and commodity
cluster x86 systems to high-end multi-processor supercomputers. Minimum requirements
are a Fortran compiler (the free g77 compiler is sufficient) and a UNIX like
operating system (such as Linux, Solaris, IRIX).
A broad span of example problem
configurations are included in the release. These examples range from planetary scale
circulation simulations of the ocean and atmosphere to high-resolution, small-scale
process studies encompassing non-hydrostatic dynamics. In addition to conventional
prognostic operation, differentiated forms (both tangent-linear and adjoint)
of the MITgcm code can be generated automatically using either the TAMC or TAF
automatic differentiation tools. These derivative forms can be used for dynamical
sensitivity studies and can also be used, together with appropriate optimisation and
control infrastructure, for mathematically rigorous state-estimation and
data-assimilation. A seamless interface to the ECCO group optimisation
environment is available.